Articles Tagged "CO2 Level"
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Wednesday, February 6th 2013, 9:23 AM EST
An important new paper published today in Global Biogeochemical Cycles finds that "In contrast to recent claims, trends in the airborne fraction of anthropogenic carbon [dioxide] cannot be detected when accounting for the decadal-scale influence of explosive volcanism and related uncertainties." In other words, after accounting for the large effect of volcanic eruptions, ENSO, and other uncertainties upon natural CO2 sinks, trends in the man-made fraction of atmospheric CO2 "cannot be detected." Thus, despite an exponential increase in man-made CO2 emissions, there is no statistically significant trend in the man-made fraction of CO2 in the atmosphere.
This further suggests that man is not the primary cause of the increase of CO2 in the atmosphere, that temperature is responsible for the increase in CO2 levels due to out-gassing. According to the authors, "Our results highlight the importance of considering the role of natural variability in the carbon cycle for interpretation of observations and for data-model intercomparison."
Note man-made emissions are only about 4% of the total CO2 emissions in the atmosphere, and CO2 only represents about 0.04% of the entire atmosphere
Click source to read more and link
Sunday, January 20th 2013, 4:54 PM EST
Here we go again. Multiple news outlets have been asserting of late that manmade global warming is causing the current Australian drought and heatwave. During the summer of 2012 it was the drought and heatwaves of the Central Plains of the United States that were said to be proof of manmade global warming; in 2011 it was the drought and heatwaves in Texas; in 2010 it was the drought and heatwaves in Russia.
Just two months ago the World Bank released a report entitled, “Why a 4°C Warmer World Must be Avoided, Turn Down the Heat,”[i] which has since been cited in dozens of news outlets bolstering the mass hysteria currently sweeping the globe over impending catastrophic manmade global warming. Attributing droughts and heatwaves to manmade global warming they wrote, “an exceptional number of extreme heat waves occurred in the last decade; major food crop growing areas are increasingly affected by drought” and “Increasing vulnerability to heat and drought stress will likely lead to increased mortality and species extinction.” Regardless of how alarming these reports may be and how frequently they are cited in the news they all betray an unfortunate reality; those who fret over impending catastrophic manmade global warming don’t even understand the scientific hypothesis upon which it is based—anthropogenic humidity.
Friday, January 18th 2013, 1:42 PM EST
The 2012 year-end satellite measurements continue to be cruel to the IPCC's green-sharia scientists - this UN agency has long predicted huge atmospheric global warming from CO2 emissions .....yet in reality, global cooling currently dominates
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Wednesday, January 16th 2013, 5:54 PM EST
For too long, scientists who promote the hypothesis that man’s carbon dioxide (CO2) emissions are causing dangerous global warming have been given a free ride by politicians and the press. Their pronouncements, no matter how fantastic, are accepted without question and repeated ad nauseam by compliant governments and reporters alike. When scientists do what all scientists are supposed to do — question and probe — they are treated as enemies of the people and condemned by opinion leaders.
With the upcoming release of the latest UN Intergovernmental Panel on Climate Change report, 2013 can be the year governments and media grow up on climate change.
Treat catastrophists who push for climate and energy policies that would bankrupt us just as we do other end-of-the-world cultists: demand they prove their beliefs before providing them the time of day, let alone our tax dollars. Insist that climate catastrophists cease with their speculations and instead employ the scientific method.
Wednesday, January 9th 2013, 1:35 PM EST
Click source for biiger image
Tuesday, January 8th 2013, 4:37 PM EST
A new global temperature forecast published by the Met Office, through to 2017, has scaled back projections of the amount of warming they expect compared with previous estimates.
The new projection can be seen below with more details on the Met Office website.
I have written several times in the last few years on the subject of Met Office global temperature predictions, and how they have been regularly too warm.
In the 12 years to 2011, 11 out of 12 forecasts were too high - and although all projections were within the stated margin of error, none were colder than expected.
One of their most high profile forecasts came in late 2009, coinciding with the Copenhagen climate conference.
It stated that half the years between 2010 and 2015 would be hotter than the hottest year on record, which I wrote about on my blog.
Friday, January 4th 2013, 2:05 AM EST
Figure 1. Temperature and CO2 variations as per the cited data sources. Temperature variations have been divided by 2, as discussed in the text. Graph ends at 1950, most recent CO2 data is from about 2,300 years ago. Maximum temperature during the previous interglacial was about a degree and a half warmer than 1950.
Photograph shows that Photo Source http://dxing.at-communication.com/en/ri1anc_vostok-base_antarctica/
There’s been a recent paper claiming a long-term correlation between CO2 and sea level, discussed here at WUWT. The paper implies that CO2 controls temperature and thus indirectly sea level. I thought I might follow up the comments on that thread by looking at what the ice core records actually tell us about variations in CO2. There is plenty of dispute about the ice core records, but I don’t want to touch on that here, that’s a separate discussion. Instead, let me take the ice core records as given and see where that leads us. Figure 1 shows the Vostok ice core CO2 and temperature variations.
Wednesday, January 2nd 2013, 1:10 PM EST
Contact: Catherine Beswick, firstname.lastname@example.org, National Oceanography Centre, Southampton (UK)
By comparing reconstructions of atmospheric CO2 concentrations and sea level over the past 40 million years, researchers based at the National Oceanography Centre, Southampton have found that greenhouse gas concentrations similar to the present (almost 400 parts per million) were systematically associated with sea levels at least nine metres above current levels.
The study determined the 'natural equilibrium' sea level for CO2 concentrations ranging between ice-age values of 180 parts per million and ice-free values of more than 1,000 parts per million.
It takes many centuries for such an equilibrium to be reached, therefore whilst the study does not predict any sea level value for the coming century, it does illustrate what sea level might be expected if climate were stabilized at a certain CO2 level for several centuries.
Lead author Dr Gavin Foster, from Ocean and Earth Science at the University of Southampton which is based at the centre, said, "A specific case of interest is one in which CO2 levels are kept at 400 to 450 parts per million, because that is the requirement for the often mentioned target of a maximum of two degrees global warming."
The researchers compiled more than two thousand pairs of CO2 and sea level data points, spanning critical periods within the last 40 million years. Some of these had climates warmer than present, some similar, and some colder. They also included periods during which global temperatures were increasing, as well as periods during which temperatures were decreasing.
Sunday, December 30th 2012, 2:56 PM EST
The leaked Second Order Draft IPCC AR5 essentially repeats the AR4 estimate of a climate sensitivity of 3 C:
#Equilibrium climate sensitivity is likely in the range 2°C–4.5°C, and very likely above 1.5°C. The most likely value is near 3°C. Equilibrium climate sensitivity greater than about 6°C–7°C is very unlikely.
Let me here leak the following update of my previous 10 times smaller estimate of climate sensitivity coming down to 0.3 C, based on the following argument using the standard numbers of
#Earth surface temperature: + 15 C
#top of the atmosphere TOA temperature: - 18 C at 5 km altitude
#lapse rate: 6.5 C/km
#dry adiabatic lapse rate: 10 C/km
#transported from surface to TOA by thermodynamics: 120 W/m2
#transported from surface to TOA by radiation: 60 W/m2.
Friday, December 28th 2012, 8:13 AM EST
The other day I noticed Peter Gleick was "name calling" (climate deniers) on Twitter, so I approched him on the topic of how much "man made" co2 there is...after his reply I was going to use words like "arrogant" and a few others, instead I thought I would just use a calculator (see below)